This section describes the keywords available for the science instruments installed on HST as of January, 2007: the Advanced Camera for Surveys (ACS), the Fine Guidance Sensor (FGS), the Near Infrared Camera and Multi-Object Spectrograph (NICMOS), the Space Telescope Imaging Spectrograph (STIS), and the Wide Field Planetary Camera 2 (WFPC2). The ACS keywords consist of a list of detectors, filters, extraction apertures, and Modified Julian Date specification. ... Filters for Camera 1 . ...